Since the millennium there has been no change in the earth's temperature. Former alarmists are now retracting their previous statements. Here is one by the father of global warming, James ‘Gaia’ Lovelock, from MSNBC:

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Mitigation of Global Warming at this late date will be HUGELY expensive and need a three-prong approach:1 buy sustainable energy equipment and barter it with foo big to fail fossil fuel firms for fossil fuel reserves to be held underground for posterity, 2 Buy fossil fuel reserves, 3 carbon capture and storage